21602274572 has 6 divisors (see below), whose sum is σ = 37803980508. Its totient is φ = 10801137284.

The previous prime is 21602274539. The next prime is 21602274581. The reversal of 21602274572 is 27547220612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2700284318 + ... + 2700284325.

It is an arithmetic number, because the mean of its divisors is an integer number (6300663418).

Almost surely, 2^21602274572 is an apocalyptic number.

It is an amenable number.

21602274572 is a deficient number, since it is larger than the sum of its proper divisors (16201705936).

21602274572 is a wasteful number, since it uses less digits than its factorization.

21602274572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400568647 (or 5400568645 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The spelling of 21602274572 in words is "twenty-one billion, six hundred two million, two hundred seventy-four thousand, five hundred seventy-two".